Abstract
We describe a new full-vector finite difference discretization, based
upon the transverse magnetic field components, for calculating the electromagnetic
modes of optical waveguides with transverse, nondiagonal anisotropy. Unlike
earlier finite difference approaches, our method allows for the material axes
to be arbitrarily oriented, as long as one of the principal axes coincides
with the direction of propagation. We demonstrate the capabilities of the
method by computing the circularly-polarized modes of a magnetooptical waveguide
and the modes of an off-axis poled anisotropic polymer waveguide.
© 2008 IEEE
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